Interpreting the 750 GeV diphoton excess within topflavor seesaw model

doi:http://dx.doi.org/10.1016/j.nuclphysb.2016.08.018

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	Interpreting the 750 GeV diphoton excess within topflavor seesaw model
	Cao, JJ ; Shang, LL ; Su, W 1; Wang, F 1,2; Zhang, Y 1
刊名	NUCLEAR PHYSICS B
	2016
卷号	911 页码:447-470
关键词	ELECTROWEAK SYMMETRY-BREAKING TOP-QUARK MASS STANDARD MODEL ROOT-S=7 TEV HIGGS-BOSON LHC CONDENSATION MECHANISM
DOI	http://dx.doi.org/10.1016/j.nuclphysb.2016.08.018
英文摘要	We propose that the extension of the Standard Model by typical vector-like SU(2) Ldoublet fermions and non-singlet scalar field can account for the observed 750GeV diphoton excess in experimentally allowed parameter space. Such an idea can be realized in a typical topflavor seesaw model where the new resonance Xis identified as a CP-even or CP-odd scalar emerging from a certain bi-doublet Higgs field, and it can couple rather strongly to photons and gluons through mediators such as vector-like fermions, scalars as well as gauge bosons predicted by the model. Numerical analysis indicates that the model can predict the central value of the diphoton excess without contradicting any constraints from 8TeV LHC. Among all the constraints, the tightest one comes from the Z gamma channel with sigma(Z gamma)(8TeV) less than or similar to 3.6fb, which requires sigma(gamma gamma)(13TeV) less than or similar to 6 fbin most of the favored parameter space. Theoretical issues such as vacuum stability and Landau pole are also addressed. (C) 2016 The Author(s). Published by Elsevier B.V.
学科主题	Physics
语种	英语
资助机构	Natural Science Foundation of China [11105124, 11222548, 90103013, 11275245, 11575053, 11675147] ; Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.R. China [Y5KF121CJ1] ; Innovation Talent project of Henan Province [15HASTIT017] ; Outstanding Young Talent Research Fund of Zhengzhou University [1421317054]
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23193]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China 2.Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100080, Peoples R China 3.Zhengzhou Univ, Sch Phys, Zhengzhou 450000, Peoples R China
推荐引用方式 GB/T 7714	Cao, JJ,Shang, LL,Su, W,et al. Interpreting the 750 GeV diphoton excess within topflavor seesaw model[J]. NUCLEAR PHYSICS B,2016,911:447-470.
APA	Cao, JJ,Shang, LL,Su, W,Wang, F,&Zhang, Y.(2016).Interpreting the 750 GeV diphoton excess within topflavor seesaw model.NUCLEAR PHYSICS B,911,447-470.
MLA	Cao, JJ,et al."Interpreting the 750 GeV diphoton excess within topflavor seesaw model".NUCLEAR PHYSICS B 911(2016):447-470.